小学四年级小数点加减法)讲课教案.doc

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1、小学四年级小数点加减法)__________________________________________________3.1+2.5=2.3+1.3=11.5+0.6=19.8-1.2=0.4+0.7=10.7+2.4=3.6+13.8=12.5+6.9=6.9+1.2=3.7+1.7=14.5+0.5=16.4+3.6=2.9+5.6=3.4+16.8=9.9+7.8=2.4+7.7=6.9+3.5=16.6+3.7=6.1+2.7=9.3+1.6=2.4+15.8=5.5+7.7=6.9+3.2=4.8+1.5=2.2+13.3=3.5+1.8=6.5+11.9=16.7-11.7=

2、13.9-3.5=3.6-1.5=2.6-0.3=6.9-0.9=10.5-9.3=12.8-3.7=2.5-1.9=13.7-4.7=____________________________________________________________________________________________________11.3+5.4=15.2+1.5=6.7+9.6=6.4+8.7=6.9+9.6=7.6+8.9=7.8+9.8=3.1+15.4=7.6+2.3=11.3+7.8=8.3+10.6=10.4+9.4=11.1+2.6=1.9+14.3=7.4+13.8=7.9

3、+11.5=3.5+6.9=9.8+7.6=9.5+13.6=8.9+16.5=7.9+3.6=6.8+4.9=5.2+12.8=9.6+6.7=13.2+2.3=10.8+2.4=6.5+14.3=7.1+5.6=__________________________________________________