Worksheets › Grade 1 › Place value › Subtracting tens Subtracting tens
Taking away tens from tens, like 70 − 30. Your child sees it as 7 tens take away 3 tens, which is 4 tens, or 40.
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How to help
Say the numbers as tens: 70 − 30 is 7 tens − 3 tens = 4 tens. A known fact like 7 − 3 = 4 gives the answer: 40.
tens groups of ten subtract take away to find what is left difference the answer when you subtract fact a small sum you know, like 7 − 3 = 4 Watch for: Dropping the zero: 70 − 30 = 4. Adding the tens instead of taking them away. Using the wrong fact: 7 − 3 = 5, so 50.
At home: Stack 9 dimes and ask how much money. Take away 4 dimes: how much now? Say it both ways: 5 dimes is 50 cents.
Sample sheet and answer key
Freddie's Frog Pond
Grade 1 · Subtracting tens · 1.NBT.C.6
Name Date
Freddie the frog lives in a busy pond full of bugs, lily pads and friends. Solve each problem to help Freddie out!
30 − 20 = 90 − 10 = 90 − 30 = 40 − 20 = 90 − 20 = 70 − 20 = 90 − 60 = 80 − 10 = 80 − 50 =
1 Toby has 90 flies. Toby gives 60 to Fern. How many flies does Toby have left?
flies Sheet Freddie's Frog Pond
Grade 1 · Subtracting tens · 1.NBT.C.6
Answer key Freddie the frog lives in a busy pond full of bugs, lily pads and friends. Solve each problem to help Freddie out!
30 − 20 = 10 90 − 10 = 80 90 − 30 = 60 40 − 20 = 20 90 − 20 = 70 70 − 20 = 50 90 − 60 = 30 80 − 10 = 70 80 − 50 = 30
− 20 In Out 30 10 80 60 90 70 40 20 70 50
− 30 In Out 70 40 80 50 90 60 50 20 60 30
1 Toby has 90 flies. Toby gives 60 to Fern. How many flies does Toby have left?
90 − 60 = 30
30 flies Answer key New problems every time, three levels (gentle, core and stretch), themes to pick from, a second page if you want one. Each sheet comes with an answer key and a one-page guide for grown-ups.
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