Free First Grade Math Worksheets: 18
Singapore Primary 1 Maths Problems

The Four Operations of Whole Numbers
Addition Subtraction
Multiplication Division

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Singapore Primary Maths Problems
First Grade Worksheet 18
The Four Operations of Whole Numbers

Dennis and Walter love to play with insects. Dennis played with 15 red ants and 22 green ants yesterday. Walter played with 9 more ants than Dennis. How many insects did they play with altogether?

Singapore Primary Maths Worksheets: Question 2

I baked 13 octopus pies and 19 squid pies for dinner. My sister baked 12 fewer pies than me. How many pies did we bake altogether?

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Question 3

Brian Bear, who had gone crazy, bit off the heads of 17 old ladies and 35 old men last month. Bianca Bear, who was actually soft-hearted, chopped off the heads of 26 fewer people than Brian. How many elderly people did they kill altogether?

Singapore Primary Maths Worksheets: Question 4

There were 18 jolly jaguars and 26 limping lions on my bed. If 15 of the jaguars and 14 of the lions left for dinner, how many big cats are still on my bed?

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Question 5

Marley makes dartboards out of bull's heads and sells them to happy customers. He made 79 dartboards last year. He sold 42 and gave away 16 to poor people for he was a generous man. How many dartboards did he have at the end of the year?

Singapore Primary Maths Worksheets: Question 6

Marvin, a baker, baked 85 delicious eel cakes yesterday. A shark bought 19 cakes and a dolphin bought 34 cakes. How many cakes did Marvin have at the end of the day?

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Question 7

86 elephants were mud-wrestling. 48 of them found it to be too disgusting and left to take a bath. When a mouse joined the mud-wrestling elephants, 17 elephants fled. How many elephants were still mud-wrestling in the end?

Singapore Primary Maths Worksheets: Question 8

96 hippies were dancing in a park. It began to rain and 46 hippies ran for shelter. When it stopped raining, 13 hippies came back to the park. How many hippies were in the park in the end?

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Question 9

There were 36 men and 13 women dancing in my bathroom. When I turned on the shower to get rid of them, 14 men and 5 women ran away. How many people were still in my bathroom after that?

Singapore Primary Maths Worksheets: Question 10

There were 5 pairs of chickens line-dancing in my barn. The roosters got excited when they saw the chickens and formed themselves into groups of 4. If there were 6 roosters in each group, how many fowl were dancing altogether?

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Question 11

It was Piscine College's graduation ceremony. 18 groupers and 12 guppies stood in groups of 5 to take their photographs. How many groups had their photos taken?

Singapore Primary Maths Worksheets: Question 12

15 baboons and 23 chimps attended a wedding dinner. Unfortunately, there were only 7 tables with 5 chairs around each table. How many animals didn't get any seats?

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Question 13

When I rubbed my magic lamp, a genie appeared and granted me a wish. I asked for 6 mules with 6 peacocks on each mule. I roasted 12 of the peacocks and had a wonderful feast with my friends. As for the rest of the peacocks, I made them form into groups of 3 and belly dance for me. How many groups of pretty peacocks danced for me?

Singapore Primary Maths Worksheets: Question 14

3 imps and 4 fairies went fishing in a lake last month. The imps caught 5 leather boots each. The fairies caught 7 nylon boots each. Of course, the gloating fairies caught more boots than the imps. But by how many more?

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Question 15

My father and mother loved to hunt rhinos in Africa and India. Last year, my mother shot 22 rhinos and my father shot 36 rhinos. They made leather shoes and leather shirts out of 37 of the rhinos. They mounted the heads of the remaining rhinos and gave them equally to Natasha, Vanessa and Clarisse. How many rhino heads did Clarisse get?

Singapore Primary Maths Worksheets: Question 16

I have 3 sisters with 4 heads each and 3 brothers with 5 heads each. Tomorrow is their birthday. I went to a shop to buy caps for all of their heads. Unluckily, there were only 11 pink caps and 13 blue caps. How many heads will not be wearing any caps on their birthday?

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Question 17

An ogre and a troll were terrorizing our town yesterday. My aunt, an amazing superhero, hurled 18 huge boulders at the ogre and killed it. My uncle, a powerful superhero, threw 4 more enormous boulders than my aunt at the troll and killed it. The police, however, were unhappy at the number of boulders rolling about in town and ordered my uncle and aunt to collect them all and bring them back home. My poor uncle and aunt were able to find only half of the boulders. They brought them home and piled them up in groups of 5. How many boulders were in each pile?

Singapore Primary Maths Worksheets: Question 18

Bob, Gob and Tob had nothing better to do. So they decided to throw marbles at some poor frogs in a pond. Bob threw 21 marbles and Gob threw 14 marbles. Tob threw 19 more marbles than the total number of marbles Bob and Gob threw. How many marbles did Tob throw?

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Question 19

This is not a swimming competition. In a crocodile catching competition, a total of 99 crocodiles were caught by 3 participants. Mark caught 24 crocodiles. Brian caught 23 more crocs than Tony. Brian triumphantly brought his crocs home and asked his wife to roast the crocs. Brian and his wife ate 22 of the roasted crocs and gave the rest equally to their 3 kids. How many roasted crocs did each kid get? By the way, did Mark win the silver medal or the bronze medal?

Singapore Primary Maths Worksheets: Question 20

Wendy Witch caught some bats last night and stuffed them into 4 bottles. Each bottle had 7 bats. She removed 2 bats from each bottle and gave them to Wally Wizard to make a spell. If Wally has 9 more bats than Wendy now, how many bats did he have before Wendy gave him some?

This 1st Grade Math
Free Elementary Math Worksheet: 18
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Singapore 1st Grade Math Worksheet 18 - Answers

Q1 - 83, Q2 - 52, Q3 - 78, Q4 - 15, Q5 - 21

Q6 - 32, Q7 - 21, Q8 - 63, Q9 - 30, Q10 - 34

Q11 - 6, Q12 - 3, Q13 - 8, Q14 - 13, Q15 - 7

Q16 - 3, Q17 - 4, Q18 - 54, Q19 - 9, Bronze medal, Q20 - 21

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