計算下面各題,能簡算的要簡算1 29 3

2021-05-21 07:13:46 字數 2222 閱讀 5810

1樓:匿名使用者

(1)1.29+3.7+2.71+6.3,=(1.29+2.71)+(3.7+6.3),=4+10,

=14;

(2)3.75÷[0.3×(1.34-0.84)],=3.75÷[0.3×0.5],

=3.75÷0.15,

=25;

(3)7.2×7.2+7.2×2.8,

=7.2×(7.2+2.8),

=7.2×10,

=72;

(4)0.25×0.8×0.125×4,

=(0.25×4)×(0.125×0.8),=1×0.1,

=0.1;

(5)25×10.8×0.04,

=25×0.04×10.8,

=1×10.8,

=10.8;

(6)15.32-1.8×5-3.46,

=15.32-9-3.46,

=6.32-3.46,

=2.86.

計算下面各題,能簡算的要簡算. 1.29+3.7+0.71+6.3 7200÷25÷4 99×36+36 6.75-1.89-2.11 4000÷25

2樓:手機使用者

(1)1.29+3.7+0.71+6.3

=(1.29+0.71)+(3.7+6.3)=2+10

=12;

(2)7200÷25÷4

=7200÷(25×4)

=7200÷100

=72;

(3)99×36+36

=(99+1)×36

=100×36

=3600;

(4)6.75-1.89-2.11

=6.75-(1.89+2.11)

=6.75-4

=2.75;

(5)4000÷25-13×12

=160+156

=316;

(6)24×(133-1296÷12)

=24×(133-108)

=24×25

=600.

簡便計算下面各題.1.29+3.7+0.71+6.3

3樓:首歐偃當寂

(1)1.29+3.7+0.71+6.3,=(1.29+0.71)+(3.7+6.3),=2+10,

=12;

(2)28.2-19.7,

=28.2-(20-0.3),

=28.2-20+0.3,

=18.2+0.3,

=18.5;

(3)75.8-(15.3+5.8),

=75.8-15.3-5.8,

=75.8-5.8-15.3,

=70-15.3,

=54.7;

(4)23.4-8.54-1.46,

=23.4-(8.54+1.46),

=23.4-10,

=13.4;

(5)19×36-36×9,

=36×(19-9),

=36×10,

=360;

(6)879×102,

=879×(100+2),

=879×100+879×2,

=87900+1758,

=89658.

計算下面各題,怎樣簡便就怎樣算. 1.29+3.7+0.71+6.3 23.4-8.54-1.46 6.75×0.5+4.86 19×

4樓:後冷珍

(1)1.29+3.7+0.71+6.3,=(1.29+0.71)+(3.7+6.3),=2+10,

=12;

(2)23.4-8.54-1.46,

=23.4-(8.54+1.46),

=23.4-10,

=13.4;

(3)6.75×0.5+4.86,

=3.375+4.86,

=8.235;

(4)19×3.6-3.6×9,

=3.6×(19-9),

=3.6×10,

=36;

(5)2.5×1.8×0.04,

=2.5×0.04×1.8,

=0.1×1.8,

=0.18;

(6)10.24÷1.25÷8,

=10.24÷(1.25×8),

=10.24÷10,

=1.024.

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