按要求计算
(1)化简比
①:0.75; ②
分米:
厘米
(2)求未知数x
①x:=51:17;②
×7+4x=850%
(3)简便计算
①4.05﹣2.86﹣0.14;②7×0.6+0.4×7
;③2.25×3.14×4+3.14;④(
﹣
)×17×5.
直接写得数.
0.67+4.5= 1+2%==
=
=
=
= 0.32÷4=
2.2+8= 5÷×
= 0.25×
×4= 15+5÷0.2=
4.38﹣3.42+5.62﹣2.08= 125÷= 1÷25%= 0×
=
2﹣= 32×1.25×2.5=
直接写出得数.
9.9+0.9= 0.36÷0.6= 10﹣1.25= 0.5×1.2=÷8=
×39=
÷0.25= 0×
÷
=
×
÷
×
=(
+
)×6=
直接写出得数
(1)×6=
×3.5= 20÷
=
÷20=
(2)÷3.5=
÷
=
×
=
×
×0=
(3)10÷= 1÷20%=
×4×
=
×7÷
×7=
(4)(﹣
)×20=
﹣
×
=
×
+
×
=
÷8÷
=
直接写得数.=
=
=
=
=
=
=
=