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P. 36
For example, (4671 + 3556) + 1237
= 8227 + 1237 4 6 7 1 8 2 2 7
3 5 5 6 1 2 3 7
= 9464
8 2 2 7 9 4 6 4
4671 + (3556 + 1237)
= 4671 + 4793 3 5 5 6 4 7 9 3
= 9464 1 2 3 7 4 6 7 1
So, (4671 + 3556) + 1237 4 7 9 3 9 4 6 4
= 4671 + (3556 + 1237)
MENTAL MATHS-5
Fill in the blanks.
(a) 2479 + 3014 = 3014 +
(b) 4469 + 2394 = + 4469
(c) 5237 + 000 0 =
(d) 0000 + 000 0 = 4567
(e) 4231 + 0 = 0 +
(f) 0000 + 1463 =
(g) (3482 + 2348) + 3214 = 3482 + ( + 3214 )
(h) 1568 + + 2464 = + 2234 +
36
Addition
Mathematics-3
