Target Math Practice

Item 5 No Regroup

Item 6 No Regroup

Item 7 No Regroup

Item 8 Regroup 1s→10s

Item 9 Regroup 10s→H

Item 10 Regroup H→Th

Target Math Practice • Teacher Diagnostic Key Page 1 of 2

Teacher Key

Addition Action Key (Continued)

Items 11–20

Remediation Note: Problems 15–20 feature multi-column regrouping. Ensure students don't write two digits in a single place column.

Double Regrouping Focus

Item 11 Regroup 1s→10s

Item 12 Regroup 10s→H

Item 13 Regroup H→Th

Item 14 Regroup 1s→10s

Item 15 Double (1s, 10s)

Item 16 Double (10s, H)

Item 17 Double (1s, 10s)

Item 18 Double (10s, H)

Item 19 Double (1s, H)

Item 20 Double (1s, 10s)

Target Math Practice • Teacher Diagnostic Key Page 2 of 2

Item 6

Item 7

Item 8

Item 9

Item 10

Place Values: H = Hundreds • T = Tens • O = Ones Page 1 of 2

Packet 2

Subtraction Mastery (Continued)

Name:

Strategy Tip: When borrowing past zero, borrow from Hundreds (H) so the zero becomes 10, then borrow a ten for Ones (O).

Part 2 (Q 11–20)

Item 11

Item 12

Item 13

Item 14

Item 15

Item 16

Item 17

Item 18

Item 19

Item 20

Place Values: H = Hundreds • T = Tens • O = Ones Page 2 of 2

Item 6 Borrow 10s→1s

Item 7 Borrow H→10s

Item 8 Double Borrow

Item 9 Double Borrow

Item 10 Double Borrow

Target Math Practice • Teacher Diagnostic Key Page 1 of 2

Teacher Key

Subtraction Mastery Key (Continued)

Items 11–20

Remediation Note: In problems 15–20 (borrowing past zero), check that students don't skip the tens place or write 10 instead of 9 in the tens place after passing to the ones.

Borrow Across Zero Focus

Item 11 Double Borrow

Item 12 Double Borrow

Item 13 Double Borrow

Item 14 Double Borrow

Item 15 Across Zero

Item 16 Across Zero

Item 17 Across Zero

Item 18 Across Zero

Item 19 Across Zero

Item 20 Across Zero

Target Math Practice • Teacher Diagnostic Key Page 2 of 2

Item 6

Item 7

Item 8

Item 9

Item 10

Place Values: Th = Thousands • H = Hundreds • T = Tens • O = Ones Page 1 of 2

Packet 3

Mixed Operations (Continued)

Name:

Check the Sign: Addition (+) means combine numbers together. Subtraction (−) means take away from the top number.

Part 2 (Q 11–20)

Item 11

Item 12

Item 13

Item 14

Item 15

Item 16

Item 17

Item 18

Item 19

Item 20

Place Values: Th = Thousands • H = Hundreds • T = Tens • O = Ones Page 2 of 2

Item 5 Add • 1s→10s

Item 6 Sub • Double

Item 7 Add • 10s→H

Item 8 Sub • Zero

Item 9 Add • Double

Item 10 Sub • Double

Target Math Practice • Teacher Diagnostic Key Page 1 of 2

Teacher Key

Mixed Operations Key (Continued)

Items 11–20

Sign Confusion Note: Check whether students accidentally added instead of subtracted, or vice versa, on items 11–20.

Mixed Operational Control

Item 11 Add • Double

Item 12 Sub • 10s→1s

Item 13 Add • None

Item 14 Sub • Zero

Item 15 Add • H→Th

Item 16 Sub • Double

Item 17 Add • 10s→H

Item 18 Sub • Zero

Item 19 Add • Double

Item 20 Sub • Double

Target Math Practice • Teacher Diagnostic Key Page 2 of 2