數學複習

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
1.45=9×5,所以9和5都是45的數,45是9或5的數。
2.26個0.001是
3.2.197-0.8358=
4.4000個0.001是
5.0.3545有個1、個0.1、個0.01、個0.001和個0.001。
6.1.96307的千分位數字是、十萬分位數字是
7.78+21×3-67=
8. 93-(42+3)÷3=
9.0.3375+0.8641=
10.A、B、C三數的平均數是68,D、E、F、G四數的平均數是47,這7個數的平均數是多少?
11.燈泡工廠一天生產745顆省電燈泡和865顆日光燈泡,工廠七、八月假日不停工,兩個月共生產多少顆燈泡?
12.一包紅豆重13.437公斤,一包綠豆重5.6855公斤。一包綠豆和一包紅豆共重多少公斤?它們相差多少公斤?