lesson
Adding a Multiple of Ten and a One-Digit Number
Mentally combine a multiple of 10 and a one-digit number to find the sum up to 99 using place-value reasoning.

Mentally combine a multiple of 10 and a one-digit number to find the sum up to 99 using place-value reasoning.
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6 lessons
Use concrete and pictorial models to determine the sum of a multiple of 10 and a one-digit number in problems up to 99.
use concrete and pictorial models to determine the sum of a multiple of 10 and a one-digit number in problems up to 99;
analyze mathematical relationships to connect and communicate mathematical ideas; and
display, explain, and justify mathematical ideas and arguments using precise mathematical language in written or oral communication.