脫式計算能簡算的要簡算

2021-03-19 18:19:04 字數 1515 閱讀 7361

1樓:邊緣

(1)100+120÷15,

=100+8,

=108;

(2)2.25×

4.8+7.75×4.8,

=4.8×(2.25+7.75),

=4.8×10,

=48;

(3)3

16-5

8÷4,

=316

-532,=6

32-532,

=132

;(4)16×2

5÷(56?3

4),=16

×25÷(10

12-9

12),

=115

÷112,=1

15×12,=45.

脫式計算(能簡算的要簡算) 2.5×7.1×4 16.12×99+16.12 5.2×0.9+0.9×4.8 [113-(34.15+3

2樓:誒呀

(1)2.5×7.1×4,

=(2.5×4)×7.1,

=10×7.1,

=71;

(2)16.12×99+16.12,

=16.12×(99+1),

=16.12×100,

=1612;

(3)5.2×0.9+0.9×4.8,

=0.9×(5.2+4.8),

=0.9×10,

=9;(4)[113-(34.15+38.25)]÷2,=[113-72.4]÷2,

=40.6÷2,

=20.3;

(5)3.6÷(1.2+0.6)×0.5,=3.6÷1.8×0.5,

=2×0.5,

=1;(6)4.82÷0.25+1.25÷0.25,=4.82×4+1.25×4,

=19.28+5,

=24.28.

脫式計算.(能簡算的用簡算)(1)25×4.4(2)7.7×0.16÷7.7×12.5 (3)10.64÷(3.7-2.9)(4)4.8

3樓:手機使用者

(1)25×

4.4,

=25×4+25×0.4,

=100+10,

=110;

(2)7.7×0.16÷7.7×12.5,=7.7÷7.7×0.8×0.2×12.5,=1×0.2×12.5×0.8,

=0.2×10,

=2;(3)10.64÷(3.7-2.9),=10.64÷0.8,

=13.3;

(4)4.8×99+4.8,

=4.8×(99+1),

=4.8×100,

=480;

(5)47.3+21×(3.9-0.87),=47.3+21×3.03,

=47.3+63.63,

=110.93;

(6)5×[(68.41-32.17)÷0.4],=5×(36.24÷0.4)

=5×90.6,

=453.

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