Addition Technique 4: Add more, then Subtract the Extra
Best when both numbers are near 100 (95–99).
Not checked
Score 0
98 + 96
Tip: Think “100 − extra”. Then do 200 − (extraA + extraB).
100 number 98 extra
100 number 96 extra
= (100 − ) + (100 − )
= 200 −
=
98 + 96 =
STEP 1
Make 100.
98 + = 100
96 + = 100
100 + 100 = 200
STEP 2
Subtract the extra.
+ =
200 =
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