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10s Complement Addition
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Mental MathMental MathMental MathMental MathTens ComplementTens Complement
Tens complement
1 9 10
2 8 10
3 7 10
4 6 10
5 5 10
So
11 9 20
1.2 0.8 2.0
370 230 600
400 600 1000
20.5 5.5 26.0
80 20 100
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0 0 08 2 1 0
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33 737 0
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33 3 77 0
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1040 306 00 11 0
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4 610 0 30 0 1100
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5146 563 72 107 8
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146 632 15 785 07
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27.30 33. 605 0.35
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2 .30 3 .057 3 60.35
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280.5 420 7.5 01.0
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2 0. 4 05 5 .8 . 02 701
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100.00 99.99 0
or jus
0
t
.01
100
Work it out!
. 00.0 100.00
or ju
9
s
1
t
99
00
9
1
Work it out!
