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.
計算下面各題,能簡算的要簡算
1 9.2 25 0.4 8 36.8 3.2 40 2 17 8 178 3 4 158 89 53 3 1 12 1 6 112 1 20 1 30 1 1 2 12 1 3 13 1 4 14 1 5 15 1 6 1 12 1 2 13 1 3 14 1 4 15 1 5 16 1 6 4 ...
計算下面各題,能簡算的要簡算。
你好,很高興為你解答 34 34 35 35 1 1 1 35 35 1 1 1 35 33 1 35 就是33又1 35 這是乘法分配律的變形,首先把34變回成 35 1 這樣就可以利用乘法分配律來計算了。34 34 35 35 1 34 35 35 34 35 1 34 35 34 34 35 ...
計算下面各題,能簡算的要簡算,計算下面各題,能簡便的要簡便計算
1 7.29 4.6 46 2.71 7.29 4.6 4.6 27.1 4.6 7.29 27.1 2 2分之1 3分之2 8分之1 4分之1 1 2 2 3 1 8 1 4 1 2 2 3 3 8 1 2 1 4 2 3 2.2 3.83 2.2 5.17 2.2 2.2 3.83 5.17 1...