1樓:昨夜星辰吉日
17.31+8.6+1.69+1.3
=(du7.31+1.69)
zhi+8.6+1.3
=9+8.6+1.3
=17.6+1.3
=18.9
2dao35.69+4.4-5.69
=(35.69-5.69)+4.4
=30+4.4
=34.4
3內67.84-(11.58+27.84)=67.84-11.58-27.84
=(67.84-27.84)-11.58
=40-11.58
=28.42
4容 100.01-56.7-3.3
=100.01-(56.7+3.3)
=100.01-60
=40.01
516.56-3.8+6.2
=16.56+6.2-3.8
=22.76-3.8
=18.96
69.3+9.4+9.5+8.9+9.3
=9+0.3+9+0.4+9+0.5+9-0.1+9+0.3=9x5+(0.3+0.4+0.5-0.1+0.3)=45+1.4
=45.14
用遞等式計算(能簡算要簡算)
2樓:強肚很大
(3/4-2/3)÷
(1/6+1/8)
=(9/12-8/12)÷(4/24+3/24)=1/12÷7/24
=1/12×24/7
=2/7
12÷(2/3+5/6)
=12÷(4/6+5/6)
=12÷9/6
=12×2/3
=83-(1/8+3/4÷3/8)
=3-1/8-3/4×8/3
=3-1/8-2
=1-1/8
=7/8
5/8×2/7+5/8÷7/5
=5/8×2/7+5/8×5/7
=5/8×(2/7+5/7)
=5/8×1
=5/8
1/5+4/9×3/8+5/6
=1/5+1/6+5/6
=1/5+1
=6/5
3樓:小老周
(3/4-2/3) / (1/6+1/8)=(18/24-16/24) / (4/24+3/24)=2/24 / 7/24
=2/24x24/7
=2/7
12 / (2/3+5/6)
=12 / (4/6+5/6)
=12 / 11/12
=12x12/11
=13 1/11
4樓:
懸賞太低 你正考試 所以算了
用遞等式計算(能簡算的要簡算).(1)15+325×10 &...
5樓:手機使用者
(1)15+3
25×10,=15
+65,=7
5;(2)內168.1÷(8.5-0.3),
容=168.1÷8.2,
=20.5;
(3)8.72+2.9+3.1+1.28,=(8.72+1.28)+(2.9+3.1),=10+6,
=16;
(4)4
15×29+7
9×415,
=415
×(29+79
),=4
15×1,
=415.
用遞等式計算能簡算要簡算用遞等式計算，能簡算的要簡算
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720921不能簡算請遞等式計算,能簡算就簡算
解 7.2 0.9 2.1 8 2.1 80 21 63 17 21 3 17 21 3又21分之17 用遞等式的格式計算 能簡算的可以用簡便方法計算 1 7.2 1.8 6.8 0.5,4 3.4,7.4 2 3.7 6.3 0.6 0.4,3.7 10.5 0.4,14.2 0.4,13.8 3...
遞等式計算能簡就簡
2 du0.25 0.25 2 8 0.125 7.875 2.5 zhi dao4 0.8 專1.25 2.5 0.4 1.25 8 10。3.2 0.6 屬3.2 0.6 1.2 3.2 3.2 0.6 0.6 1.2 0.3 用遞等式計算 能簡算的要簡便計算 0.175 0.25 4.27.5...