# 因数带 有0的 三位数乘二位数 - PowerPoint PPT Presentation

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1、进一步认识“0‘在乘法运算中的特性。

2、学会用简便方法计算两个因数末尾有0的乘法。

8×20=

4×130=

40×20=

30小时行多少千米?

160

× 30

160×30=

48

00

220 ×40 160 ×60

360 ×50 580 ×12

1、填一填

0

0

0

2、我会算

240×22= 180×50=

240×34403×23

403

× 23

1209

806

9269

240

× 34

96

72

8160

2 3 0

× 4 0

2 3 0

× 4 0

0 0 0

9 2 0 0

9 2 0

9 2 0

230 ×50 = 306 ×60=

80 ×506= 60 ×90=

410 ×60= 280 ×150=

1、同学们进行电脑打字比赛，小强平均每分钟打120个字，一节课（40分钟）大约打了多少个字？

120×40=

4800