用竖式计算：356+237= 620﹣338= 71÷8= 48÷6= 542﹣476=验算： 354+177=验算：
12个连加的和是多少？
实际烧煤量比原计划节约． × （1） = ．
直接写结果×= 3×= ×=×= ×= ×=×9= ×0=
口算：24× + ×57 +× 2﹣1 + ﹣1﹣﹣ +﹣+ ×9+．
直接写得数= == == == == == == ==
连加的和是多少？
． × （1
） = ．
×
= 3×
= 
×
=
×
×
= 
×
=
×9= 
×0=
+
×57 
+
×
2﹣1
+
﹣
﹣
+
﹣
×9+
= 
=
= 
=
= 
=
= 
=
= 
=
= 
=
= 
=
=
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