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列式计算.(1)4与0.4的和的25倍是多少

(1)(4+0.4)×25,=4.4×25,=110.答:是110.(2)0.5×48-1.5×12,=24-18,=6.答:差是6.

(1)(4+0.4)×25,=4.4×25,=110.答:是110.(2)0.5×48-1.5×12,=24-18,=6.答:差是6.

列式计算.(1)4与0.4的和的25倍是多少 (4+0.4)x25 =4x25+0.4x25 =100+10 =110

(3-0.4)×25 =3×25-0.4×25 =75-10 =65

列式为: 48-4/5x25 =48-20 =28

(4+0.4)×25 =4×25+0.4×25 =100+10 =110

X乘以10*10除以(4*25)=3 X=3

(1)54×38=2052;答:是2052.(2)67×25=1675;答:是1675.(3)225÷5=45;答:商是45.(4)115×6+4=694;答:这个数是694.

(0.4×25-7.2)÷2 =(10-7.2)÷2 =2.8÷2 =1.4, 所求数字是1.4

66*25*4 =66*(25*4) (乘法的结合律) =66*100 =6600 66的25倍与4的乘积是6600

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