用适当的方法做下面各题．（1）25×（40+6）（2）49×99（3）（58+76）×12（4）720﹣（750÷15+248）
×1= 52﹣42= 0.75﹣0.5=×=÷= 125×0.08= 0.5+0.02=÷=÷= 0.15×6= 12÷0.3= 0÷=
直接写得数．×16= 12÷= 24×=×÷= 1÷=÷15=÷=×÷×=
口算我最棒= 26×======= 6.4÷20%= 125%×8=
直接写得数． 10÷=÷=×= 55×÷=×2= 1÷=÷= 0×+=
口算×15=×2=×=×=÷=÷3=÷5=÷=
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×1= 52﹣42= 0.75﹣0.5=
=
÷
= 125×0.08=
÷
= 0.15×6= 12÷0.3= 0÷
=
×16= 12÷
= 24×
=
×
÷
=
÷15=
÷
=
×
÷
= 26×
=
=
=
=
=
=
= 6.4÷20%= 125%×8=
=
÷
=
= 55×
÷
=
×2= 1÷
=
÷
= 0×
+
=
×15=
×2=
×
=
×
=
÷
=
÷3=
÷5=
÷
=