=1÷0.8,
=1.25
答:得1.25
2x-2.6×4=10,
2x-10.4=10,
2x=20.4,
x=10.2
答:这个数是10.2.
(1)1÷(1.6×0.5), =1÷0.8, =1.25; 答:商是1.25. (2)(2.6×4+10)÷2, =(10.4+10)÷2, =20.4÷2, =10.2; 答:这个数是10.2. (3)(32.8+3.6)÷4, =36.4÷4, =9.1; 答:乙数是9.1. (4)80.5÷(3+
=80.5÷3.5, =23; 答:这个数是23. (5)(10.1+24.35)÷13×0.6, =34.45÷13×0.6, =2.65×0.6, =1.59; 答:积是1.59. (6)16×2÷3.2-4.6, =32÷3.2-4.6, =10-4.6, =5.4(米). 答:下底是5.4米. |
=10÷0.8,
=12.5;
答:得12.5.
(2)(2.6×4+10)÷2,
=(10.4+10)÷2,
=20.4÷2,
=10.2.
答:这个数是10.2.
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