One page to give on the first day of the unit on subtracting within 100, before any teaching. Its six questions are on what the unit builds on: subtraction facts within 20, the tens and ones of base-ten blocks and the same number with a ten traded, taking away tens, adding two-digit numbers, thinking addition to subtract and counting up to the next ten. It has a Score line, and the key names the lesson each question leads into. The unit review and the unit test are packs of their own.
Give the pre-check on the first day and see who can trade a ten for 10 ones: a student who cannot yet needs base-ten blocks in hand for the lessons on breaking a ten, and one who misses the facts within 20 needs fact practice beside the unit. Nothing on the page asks for a two-digit number taken from another yet, so a low score is no surprise; it shows where to start.
Use it to see what your child needs before the unit on subtracting within 100 starts: practice the subtraction facts within 20 aloud, and count up from a number like 46 to the next ten.
This pack supports the following Common Core State Standards for Mathematics:
© Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.
A check to give before the unit on subtracting within 100, on what the unit builds on. Students answer subtraction facts within 20, trade a ten for 10 ones, take away tens, add two-digit numbers, think addition to subtract and count up to the next ten.
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