Addition of three-digit numbers
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535
↓
537
↓
537
649
↓
↓
237
↓
↓
531
↓
↓
385
↓
↓
884
↓
↓
783
↓
↓
(1) Increase the numbers by 2.
382 + 10 =
607 + 60 =
330 – 10 =
260 – 50 =
(2) Calculate.
179 = 1 ·100+7· 10+9 · 1
364 =
379 =
222 =
605 =
680 =
(3) Decompose the numbers into a sum of multiples of decimal units.
564
+ 114
+ 114
524
+ 146
+ 146
278
+ 185
+ 185
233
+ 150
+ 150
148
+ 111
+ 111
(4) Add the numbers whose sum of units is greater than 9.
333
+ 154
+ 154
210
+ 434
+ 434
429
+ 297
+ 297
177
+ 195
+ 195
133
+ 7
+ 7