Grade 1 study

What does the count-on strategy mean in math?

The count-on strategy is one of the first mental math tools. Start at the larger addend and count forward. It works best when adding 1, 2, or 3.

What are doubles facts in math?

Doubles facts add a number to itself.. A number plus itself: 4 + 4 = 8. Learn those doubles.

Is this true? When two addends are not one apart, use the doubles fact for the smaller number and add 1.

No. When two addends are one apart, use the doubles fact for the smaller number and add 1. This is called doubles-plus-one or near doubles.

What is the make-a-ten strategy?

Make-a-ten means breaking a number so part of it helps you reach 10. Then add what is left. Tens are easy to add.

What is a fact family in math?

A fact family uses the same three numbers in two addition facts and two subtraction facts.. 4, 6, and 10 live together: 4+6=10 and 10-6=4.

Is this true? Mental math is computing without pencil, paper, or a calculator.

Yes. Look at the numbers. Small add? Count on. Same? Doubles. Near 10? Make a ten.

Match each prompt to its fact.

What does the count-on strategy mean in m… → The count-on strategy is one of the first mental math tools.; What are doubles facts in math? → Doubles facts add a number to itself.; What is the near-doubles strategy? → When two addends are one apart, use the doubles fact for the smaller number and add 1.; What is the make-a-ten strategy? → Make-a-ten means breaking a number so part of it helps you reach 10.

Put these ideas in lesson order.

count on strategy → doubles fact → near doubles → make a ten