Go Forth and Multiply 與小灰灰乘法速算

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"與小灰灰乘法速算 Go Forth and Multiply"

心算 8 × 9, 好容易! 8 x 9 is easy!
心算 50 × 3, 不困難! 50 x 3 is not hard!
心算 99 × 7, 有點難…… 99 x 7 is a bit difficult…
心算209 × 6,要多次進位…… 209 x 6, too much trouble…
心算 705 × 8, 真的可以心算嗎? 705 x 8 can you really do it in your head?

如果你懂得心算乘法的竅門,你便能一口說出答案?不妨試試看。
If you know the tricks you can come up with an answer at once!

學習重點 Learning Objectives
- 三位數以內的乘法(積不超過四位數)
- Multiplication of 1-digit number and 2/3-digit numbers (product less than 4-digit numbers)

適用年級 Targets
- 小學 2-3 年級 Primary 2-3