问题描述:
用递等式计算,(写出必要的计算过程,能简便的要简便计算) 3.76+6.24×0.5 | 73×1.61-1.61+1.61×28 |
32.84-5.77-12.84-3.23 | 18.3÷6.1+2.4×2.25 |
1.66÷0.25 | [0.87÷(0.09+0.2)+2.4]÷0.54 |
最佳答案:
(1)3.76+6.24×0.5
=3.76+3.12
=6.88;
(2)73×1.61-1.61+1.61×28
=1.61×(73-1+×28)
=1.61×100
=161;
(3)32.84-5.77-12.84-3.23
=(32.84-12.84)-(5.77+3.23)
=20-9
=11;
(4)18.3÷6.1+2.4×2.25
=3+5.4
=8.4;
(5)1.66÷0.25
=1.66÷0.25÷4×4
=1.66÷(0.25×4)×4
=1.66÷1×4
=1.66×4
=6.64;
(6)[0.87÷(0.09+0.2)+2.4]÷0.54
=[0.87÷0.29+2.4]÷0.54
=[3+2.4]÷0.54
=5.4÷0.54
=10.