下面各题能简算的要用简便计算.1.36+4.85+2.64+6.15 98.5÷2.5÷4 &n...
下面各题能简算的要用简便计算.1.36+4.85+2.64+6.1598.5÷2.5÷45.4÷[2.5×(3.7-2.9)]0.8×(4-3.68)÷0.0183.7-...
下面各题能简算的要用简便计算.1.36+4.85+2.64+6.15 98.5÷2.5÷4 5.4÷[2.5×(3.7-2.9)]0.8×(4-3.68)÷0.01 83.7-12.83-0.17 5.96+13×(3.2-3.12)
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(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.
=(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.
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