人教版四年級數(shù)學下冊《6-1 小數(shù)加減法》練習題教學課件PPT優(yōu)秀公開課

1、六六 小數(shù)的加法和減小數(shù)的加法和減法法第第1 1節(jié)節(jié) 小數(shù)加減小數(shù)加減法法7 57 5 4 4+ +3 8 23 8 2 6 64 4 5 85 8 0 0驗驗4 5 84 5 8 0 0- -7 57 5 4 4算算：3 3 8 8 2 2 6 64584580 04 94 9 3 31 1 5 5 0 0 7 72 0 0 02 0 0 0 驗驗 算算：- -+ +4 94 9 3 32 2 0 00 0 0 0150715071 5 01 5 0 7 7小數(shù)小數(shù)點點末末小數(shù)小數(shù)點點末末14.714.75 51.81.85 5小數(shù)小數(shù)點點相相同同 數(shù)數(shù)位位3.23.23 32.72.79

2、9+ +1 1 7.07.0 5 52.82.8 3 3 1 1 9.89.8 8 8驗驗1 1 9.89.8 8 8- -2.82.8 3 3算算：1 1 7.7.0 0 5 519.819.88 84.34.3 2 2- - 1.61.6 1 12.2.7 7 1 1算算：2.72.7 1 1驗驗 + +1.61.6 1 14.34.3 2 22.72.71 10.30.3 7 7+ +0.0.5 50.0.8 8 7 7驗驗 算算：0.80.8 7 7- -0.0.5 50.0.3 3 7 70.80.87 74.24.2 8 8+ +0.0.7 74.4.9 9 8 8驗驗 算算：4.

3、94.9 8 8- -0.0.7 74.4.2 2 8 84.94.98 85005003 30 05 530830881081048048054541501504.4.2 20.0.7 76.6.1 13.3.2 25.85.81.1.5 54.34.37.17.12 2 5.35.3- -1 1 6.76.7 5 58.8.5 5 5 5驗驗算算：+ +1 1 6.76.7 5 58.58.5 5 5 2 2 5.35.3 0 08.58.55 5+ +3.83.8 0 06 66 6 3.83.8 0 07.07.0 1 15 5 6.6.7 7 9 963.863.85 5 6.7 6

4、.7 9 9 驗驗7.07.0 1 1 算算：- - -4 4 0.10.1 3 39.29.2 8 83 3 0.0.8 8 5 5驗驗算算：3 3 0.80.8 5 5+ +9.29.2 8 80.10.1 3 34 430.830.85 5+ +1 1 6.56.5 9 93.43.4 8 80.00.0 7 72 2驗驗 算算：- -2 2 0.00.0 7 73.43.4 8 81 1 6.6.5 5 9 920.020.07 7+ +2.72.7 8 8 3.23.25.5.9 9 8 81 1 5.35.3- -4.54.5 7 71 1 0.0.7 7 3 3. . .6km5

5、8m =6.058km 6km58m =6.058km 13km142m13km142m =13.142km=13.142km6.058km+13.142km6.058km+13.142km =19.2km=19.2km9t50kg =9.05t 9t50kg =9.05t 4t620kg =4.62t 4t620kg =4.62t 9.05t-4.629.05t-4.62t t=4.62=4.62t t24.83+51.624.83+51.6 =76.43=76.43（元（元）51.6-24.8351.6-24.83 =26.77=26.77（元（元）答：這個月笑笑家的水電費共答：這個月笑笑家的水電費共76.4376.43元元， 電費比水費多電費比水費多26.7726.77元元。0.77+0.030.77+0.03 =0.8=0.8（m m）答：答：“壯壯壯壯”出生時的胸圍是出生時的胸圍是0.80.8米米。0.8-0.760.8-0.76 =0.04=0.04（m m）答：答：“壯壯壯壯”出生時的身高比出生時的身高比“健健健健”高高0.040.04米米。答案不唯答案不唯一一如，如，“壯壯壯壯”和和“健健健健”出生時共重多少千克出生時共重多少千克？ 38.2+38.0438.2+38.04 =76.24=76.24（