1樓:瀧枋潔
(1)64%×7+36%×7,
=(64%+36%)×7,
=1×7,
=7;(2)2 3
÷(2 3
-60%)÷40%,
=2 3
÷115
÷40%,
=10÷40%,
=25;
(3)8×40%+2 5
÷1 2
,=8×40%+40%×2,
=(8+2)×40%,
=10×40%,
=4;(4)4.15-3.15×10%-5 8,=4.15-0.315-5 8
,=3.835-5 8
,=3.21.
計算下面各題,能簡算的要簡算. 7×125×8 120-20×2+45 35×(32+128÷32) 43×36+36×57 6
2樓:魯步陽冰
(1)7×125×8
=7×(125×8)
=7×1000
=7000;
(2)120-20×2+45
=120-40+45
=80+45
=125;
(3)35×(32+128÷32)
=35×(32+4)
=35×36
=1260;
(4)43×36+36×57
=(43+57)×36
=100×36
=3600;
(5)640÷[4×(16-8)]
=640÷[4×8]
=640÷32
=20;
(6)68×101-68
=68×(101-1)
=68×100
=6800.
下面各題能簡算的要用簡便計算.1.36+4.85+2.64+6.15 98.5÷2.5÷4 5.4÷[2.5×(3.7-2.9)]0.8×(4-3.6
3樓:□小千
(1)1.36+4.85+2.64+6.15,=(1.36+2.64)+(4.85+6.15),=4+11,
=15;
(2)98.5÷2.5÷4,
=98.5÷(2.5×4),
=98.5÷10,
=9.85;
(3)5.4÷[2.5×(3.7-2.9)],=5.4÷[2.5×0.8],
=5.4÷2,
=2.7;
(4)0.8×(4-3.68)÷0.01,=0.8×0.32÷0.01,
=0.256÷0.01,
=25.6;
(5)83.7-12.83-0.17,
=83.7-(12.83+0.17),
=83.7-13,
=70.7;
(6)5.96+13×(3.2-3.12),=5.96+13×0.08,
=5.96+1.04,=7.
計算下面各題,能簡便計算的用簡便方法計算 2-6/13÷9/26 (1/3+1/4)×36 6/7×(4/5-2/3)÷1/5
4樓:數學新綠洲
2-6/13÷9/26
= 2- (6/13)×(26/9)
=2- 4/3
=2/3
.(1/3+1/4)×36
=(1/3)×36 +(1/4)×36
=12+9
=21.
6/7×(4/5-2/3)÷1/5
=(6/7)×(4/5 - 2/3)×5
=(6/7)×(4 - 10/3)
=(6/7)×(2/3)
=4/7
.3/4-3/4×4/7+9/7
=(3/4)×(1- 4/7)+
9/7=(3/4)×(3/7)+9/7
=(1/4)×(9/7)+ 9/7
=(1/4 +1)×(9/7)
=(5/4)×(9/7)
=45/28
=1又17/28
下面算式和2×9÷3的運算順序相同的是( ) a.36-6×5 b.56+14÷7 c.43-25+18 d.240÷(20
5樓:手機使用者
根據題意可得:2×9÷3是按照從左向右的順序進行計算;
a、專36-6×5,先算乘法後算減法;
b、56+14÷7,先算除法,再算屬加法;
c、43-25+18.先算減法,再算加法們也是按照從左向右的順序進行計算;
d、240÷(20÷5),先算括號裡面的除法,再算括號外面的除法.由以上分析,只有c選項的運算順序與2×9÷3的運算順序相同.故選:c.
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...