看图列式不计算.
列式为: .
脱式计算,能简算的要简算.
(1)
(2)2.5×0.875+0.25×1.25
(3)
(4).
脱式计算.
()×0.25[3.6﹣(1.6+
)﹣
]×
×[
﹣(
﹣0.25)](1+
)×(1+
)×(1+
)×(1+
)×(1+
)
计算:
①+
﹣
=②3.2﹣0.85﹣1
=③3.2×
﹣
÷2=④1.725×4×0.5=
⑤(+
)÷
=⑥1.8×0.72+1.28×1.8=⑦2÷(
﹣
)=⑧57.6÷[(1.25+25%)×0.32]=.
直接写得数.
3.86+2.4=7.6﹣0.56=4.5×102=3.25+2.3+1.75=
361+199=7÷0.4=4=
=
2.5×32==0.1÷0.01=3.47﹣(2.5+0.47)=
4768÷791≈12÷=1÷
=
=5.58÷0.78≈
4.98×7.11≈=
=
用你最喜欢的方法计算.
1.25×0.25×32
(0.25+)÷(
﹣
)
×0.25+
×
[(8.7﹣7.5)÷0.2]×0.15
3.75×58.3÷58.3×6.54÷3.75÷65.4
56×(+
﹣
)