Learning Resources MathShark Manuale Scaricare il pdf (Pagina 11)

Level 5

Add 2-digit addends to 2-digit

addends without regrouping.

Level 6

Add three 1-digit addends.

+12

+34

51 + 34 =

11 + 11 =

You may want to offer one of these suggestions for

mental reminders in adding three numbers:

• always add the first two numbers, then add the

sum to the thir

• always add the easier two numbers, then add the

sum to the thir

Level 7

Add 2-digit addends to either

a 1-digit addend or another

2-digit addend with regrouping.

3 + 5 + 4 =

7 + 1 + 3 =

45 + 36 =

2 + ? = 9

? + 70 = 80

28 + 9 =

+ 39

+ 8

Level 8

Introduces the pre-algebra

concept of finding the missing

addend (shown as ?).

To find the missing addend, subtract the known

addend from the sum.

Remind players to determine the answer “mentally”

and enter the complete answer from left to right.

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Learning Resources MathShark Manuale Pagina 11