用美國小孩的方法學英語比較有效(17)：簡單數(shù)學運算
來源：含章行文
2011-03-03 08:30
Multiplication and Division
乘法和除法
Multiply with 2 and 6
2與6的乘法
(1) Joan buys six pairs of gloves. How many gloves in all does she buy? Solve the problem in 3 ways. Explain them.
(1) 瓊買了6雙手套。她總共買了多少只手套？用三種方法回答這個問題，并講解它們。
(2) Solve each problem by addition, skip-counting and multiplication.
(2) 用加法、跳躍計數(shù)和乘法解答以下各題。
①Six houses each have six windows. How many windows are there in all?
①有6間房子，每間房都有6扇窗。請問總共有多少扇窗？
②How many legs do three frogs have?
②3只青蛙共有幾條腿？
③If you have five dimes, how much money do you have?
③如果你有6個10的硬幣，那么你有多少錢？
答? 案
1.2+2+2+2+2+2= 12???????? She can add. (她可以用加法)???? 2, 4, 6, 8, 10, 12
She can skip-count. （她可以用跳數(shù)）?? 6×2＝12????????
She can multiply.（她可以用乘法）
2.①6+6+6+6+6+6=36???????? 6,12, 18, 24, 30, 36???????? 6×6=36
②4+4+4=12????????? 4, 8, 12???????? 3×4=12
③10+10+10+10+10+10=60????????? 10, 20, 30, 40, 50, 60???????? 10×6=60
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