一（1）班为青海玉树县灾区小朋友捐了35元，一（2）班为青海玉树县灾区小朋友捐了42元，一（1）班比一（2）少捐了多少元？列式：□○□=□ 答：一（1）班比一（2）少捐了 元．
口算． 3.04﹣0.98=+= 2÷9+=×÷×= 12×（+）= 6.3÷0.01= 1﹣58%=
直接写出得数． 0.57+0.43= 4.13﹣1.3= 2.5×28= 7.2÷0.6= 0.52= 3﹣1= （+）= 15÷×=×8+8×=
快快算. 6.0﹣2.4= 5.3+3.5= 4.7+3.6= 20×13= 24×30= 640÷9====
口算下列各题． 9.9+0.01= 0.08×0.5= 1.25×0.5×0.8===﹣+=
直接写出得数 ①5÷2= ②0.2×3= ③7.5+25= ④5.5﹣0.5= ⑤+= ⑥1﹣=
+
= 2÷9+
=
×
=
+
）= 6.3÷0.01= 1﹣58%=
=
+
）= 15÷
×
×8+8×
=
=
=
=
=
=
﹣
+
+
= ⑥1﹣
=
粤公网安备 44130202000953号