Target Hundred Addition Worksheet
TARGET 100
2-Digit Addition Challenge
Name:
Date:
Directions: Add the ones first, then add the tens. Look closely—two problems require regrouping!
SUMS ≤ 100
1 Tens | Ones
3 2
2 5
Work Space
2 Tens | Ones
5 1
3 4
Work Space
3 Tens | Ones
2 3
4 6
Work Space
4 Tens | Ones
4 8
2 7
Work Space
5 Tens | Ones
3 9
5 4
Work Space
Regrouping Detective
Spot the 2
Which two problems needed you to bundle 10 ones into a new ten?
Problem #
and Problem #
How do you know?
Self Check: Did every sum stay equal to or under 100?
Score:
/ 5
Target Ninety Nine Worksheet
TARGET 99
2-Digit Subtraction • No Regrouping
Name:
Date:
Directions: Subtract the ones column first, then subtract the tens column. No regrouping is needed!
MINUENDS ≤ 99
1 Tens | Ones
8 7
−
3 4
Work Space
2 Tens | Ones
9 5
−
4 1
Work Space
3 Tens | Ones
6 8
−
2 5
Work Space
4 Tens | Ones
7 9
−
5 6
Work Space
5 Tens | Ones
9 8
−
6 2
Work Space
Addition Check
Inverse Check
Pick one problem above and prove your answer using addition:
Difference + Subtrahend = Minuend
=
Did your addition sum match the top number?
Self Check: Are all numbers in the difference smaller than the minuend?
Score:
/ 5
Target Ninety Nine Worksheet B
TARGET 99
FORM B
2-Digit Subtraction • No Regrouping
Name:
Date:
Directions: Subtract the ones column first, then subtract the tens column. No regrouping needed!
MINUENDS ≤ 99
1 Tens | Ones
7 8
−
3 5
Work Space
2 Tens | Ones
9 6
−
4 2
Work Space
3 Tens | Ones
8 4
−
5 1
Work Space
4 Tens | Ones
6 9
−
2 7
Work Space
5 Tens | Ones
9 7
−
6 4
Work Space
Addition Check
Inverse Check
Pick one problem above and prove your answer using addition:
Difference + Subtrahend = Minuend
=
Did your addition sum match the top number?
Self Check: Are all digits in the difference smaller than the top number?
Score:
/ 5
Regrouping Roadmap Graphic Organizer
REGROUPING ROADMAP
Double-Digit Subtraction Graphic Organizer
Name:
Date:
More on top? No need to stop!
More on the floor? Go next door, get 10 more!
Numbers the same? Zero's the game!
1 CHECK THE ONES
Can you subtract the bottom ones from the top ones?
Yes (Subtract)
No (Regroup!)
2 TRADE & ALIGN
Tens | Ones
New Tens
+10 Ones
/
/
−
My Regrouping Story:
I unbundled 1 ten. Now I have tens and ones.
3 BASE-TEN SKETCHPAD (MODEL THE TRADE)
Rods | = 10 Dots • = 1
Action: Cross out 1 ten rod ( | ) and draw 10 new dots in the ones column!
Tens Place Draw Tens Rods
Cross out 1 ten rod, then subtract bottom tens
Ones Place +10 Ones Traded
Count total ones, then cross out bottom ones
Remaining Blocks:
Tens Left: Ones Left:
4 PROVE YOUR ANSWER (INVERSE OPERATION CHECK)
Check Math
Difference
Subtrahend
=
Minuend (Top #)
Ones & tens subtracted
Sum matches original top #
