2 计算下面各题。(能简算的要简算)(18分)4

2021-03-17 07:12:03 字数 2672 阅读 7375

1楼:柯俊喆

ヽ( `)ノヽ(#`д)ヾ(a‘)ノ

计算下面各题,怎样简便就怎样计算.4.05÷0.5+10.756.8×2.7+2.7×3.20.38×

2楼:偷艾

(1)4.05÷0.5+10.75

=8.1+10.75

=18.85

(2)6.8×2.7+2.7×3.2

=(6.8+3.2)×2.7

=10×2.7

=27(3)0.38×102

=0.38×(100+2)

=0.38×100+0.38×2

=38+0.76

=38.76

(4)70.3-17.48÷7.6

=70.3-2.3

=68(5)0.125×0.6×80

=0.125×80×0.6

=10×0.6

=6(6)8.5×1.2÷3.4

=10.2÷3.4=3

计算下面各题.(能简便的要用简便方法计算)2.3+3.91÷(22-19.7)21.6÷[64.8-(48.6-2.7×2)]0.25×0

3楼:手机用户

(1)2.3+3.91÷(22-19.7)=2.3+3.91÷2.3

=2.3+1.7

=4(2)21.6÷[64.8-(48.

6-2.7×2)]=21.6÷[64.

8-(48.6-5.4)]=21.

6÷[64.8-43.2]

=21.6÷21.6

=1(3)0.25×0.03×4

=(0.25×4)×0.03

=1×0.03

=0.03

0.13×3.89+0.13×5.11

=0.13×(3.89+5.11)

=0.13×9

=1.17

(5)10.1×87

=(10+0.1)×87

=10×87+0.1×87

=870+8.7

=878.7

计算下面各题.(能简算的要简算)(1)24×12+76×12 (2)87.5÷12.5÷8 (3)(78+34)÷18 (4)9

4楼:强颜欢笑丶炳

(1)24×制1

2+76×12,

=12×(76+24),=12

×100,

=50;

(2)87.5÷12.5÷8,

=87.5÷(12.5×8),

=87.5÷100,

=0.875;

(3(78+3

4)÷18,

=78×8+3

4×8,

=7+6,

=13;

(4)91+91×(2

13-17),

=91+91×2

13-91×17,

=91+14-13,

=92;

(5)2.2×101,

=2.2×(100+1),

=2.2×100+2.2×1,

=220+2.2,

=222.2;

(6)14.6-3.625-6.375,

=14.6-(3.625+6.375),

=14.6-10,

=4.6.

计算下面各题,能简算的要简算。(脱式计算) (6/35+4/21)÷4/7 2/ 50

5楼:匿名用户

(6/35+4/21)÷4/7

=6/35×7/4+4/21×7/4

=3/10+1/3

=9/30+10/30

=19/30

2/9÷2/7÷14/15

=2/9×7/2×15/14

=14/18×15/14

=5/6

(5/6-3/4)÷5/12+4/5

=5/6×12/5-3/4×12/5+4/5=2-9/5+4/5

=2-13/5

=-3/5

3/10÷(4/5-1/2)

=3/10×5/4-3/10×2

=3/8-3/5

=15/40-24/40

=-9/40

2/25÷3/7+23/25÷3/7

=(2/25+23/25)÷3/7

=1×7/3

=2又1/3

8/9÷5/6+1/6

=8/9×6/5+1/6

=16/15+1/6

=32/30+5/30

=37/30

=1又7/30

2/3x=16

x=16×3/2

x=24

3/4x+1/4=3/8

3/4x=3/8-1/4

3/4x=1/8

x=1/8×4/3

x=1/6

1/5x-1/2=3/10

1/5x=1/2+3/10

1/5x=8/10

x=8/10×5x=4

6楼:**防骗

6/35x7/4十4/2lx7/4=3/10十1/3=9/30十10/30=19/30

2/9x7/2x1/14=1/185/6

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