用递等式计算(能简算的要简算).7.8÷2.6+2.7×1.535.6-5×1.755.4×1.6-55.4×0.621÷2.5÷0.46.33×1
用递等式计算(能简算的要简算).7.8÷2.6+2.7×1.535.6-5×1.755.4×1.6-55.4×0.621÷2.5÷0.46.33×101-6.33(1.1...
用递等式计算(能简算的要简算).7.8÷2.6+2.7×1.535.6-5×1.755.4×1.6-55.4×0.621÷2.5÷0.46.33×101-6.33(1.1-0.78)×(2.7-1.95)
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(1)7.8÷2.6+2.7×1.5
=3+4.05
=7.05;
(2)35.6-5×1.7
=35.6-8.5
=27.1;
(3)55.4×1.6-55.4×0.6
=55.4×(1.6-0.6)
=55.4×1
=55.4;
(4)21÷2.5÷0.4
=21÷(2.5×0.4)
=21÷1
=21;
(5)6.33×101-6.33
=6.33×(101-1)
=6.33×100
=633;
(6)(1.1-0.78)×(2.7-1.95)
=0.32×0.75
=0.24.
=3+4.05
=7.05;
(2)35.6-5×1.7
=35.6-8.5
=27.1;
(3)55.4×1.6-55.4×0.6
=55.4×(1.6-0.6)
=55.4×1
=55.4;
(4)21÷2.5÷0.4
=21÷(2.5×0.4)
=21÷1
=21;
(5)6.33×101-6.33
=6.33×(101-1)
=6.33×100
=633;
(6)(1.1-0.78)×(2.7-1.95)
=0.32×0.75
=0.24.
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