4.87一1.66十5.13一2.34用简便方法计算
4.87一1.66十5.13一2.34用简便方法计算
=(4.87+5.13)-(1.66+2.34)
=10-4
=6
4.87-1.66+5.73-2.34用简便方法计演算法
4.87-1.66+5.73-2.34
=4.87+5.73-1.66-2.34
=4.87+5.73-(1.66+2.34)
=10-4
=6
7.85十2.34一7.85十4.66用简便方法计算
7.85十2.34一7.85十4.66=7.85一7.85十2.34十4.66=7
4.87-1.266+5.13-2.34的简便运算
4.87-1.266+5.13-2.34
=4.87+5.13-2.34-1.266
=4.87+5.13-(2.34+1.266)
=10-
=
问。1.266是否打错了?
4.87*2.34+4.87*6.66+4.87的简便计算
4.87*2.34+4.87*6.66+4.87
=4.87*(2.34+6.66+1)
=4.87*10
=48.7
2.34十(5.27一4.48)用简便方法怎样计算
2.34十(5.27一4.48)用简便方法怎样计算
2.34十(5.27一4.48)
=2.34+0.79
=3.13
直接计算
能简算的用简便方法计算.1.6×3.9×1.25 4.87×2.34+48.7×0.266 ...
(1)1.6×3.9×1.25,
=0.8×2×3.9×1.25,
=(0.8×1.25)×(2×3.9),
=1×7.8,
=7.8;
(2)4.87×2.34+48.7×0.266,
=4.87×2.34+4.87×2.66,
=4.87×(2.34+2.66),
=4.87×5,
=24.35;
(3)0.49×9.9,
=0.49×(10-0.1),
=0.49×10-0.49×0.1,
=4.9-0.049,
=4.851;
(4)0.125×9.3×80,
=0.125×80×9.3,
=10×9.3,
=93;
(5)2.5×3.2×12.5,
=2.5×4×0.8×12.5,
=(2.5×4)×(0.8×12.5),
=10×10,
=100;
(6)4.4×3.6-3.4×3.6,
=(4.4-3.4)×3.6,
=1×3.6,
=3.6.
用简便方法计算9.99*4.87
9.99*4.87
=(10-0.01)*4.87
=10*4.87-0.01*4.87
=48.7-0.0487
=48.6513
4.87减1.66加5.13减2.31能用简便演算法吗
4.87减1.66加5.13减2.31能用简便演算法吗
4.87减1.66加5.13减2.31
=(4.87+5.13)-(1.66+2.31)
=10-3.97
=6.03
4.87乘以2.34加上48.7乘以0.266 用简便方法怎么计算?
4.87乘以2.34加上48.7乘以0.266
=4.87乘以2.34加上4.87乘以2.66
=4.87乘以(2.34加上2.66 )
=4.87乘以5
=24.35