5-digit number
五位數
Ten thousand
一萬
Tens thousands place
萬位
10 thousands are 10,000
十個一千等於一萬
Addition with four places
四位加法
Carry 1 for every 10
滿10進1
Subtraction within four places
四位減法
Take 1 from the tens column for 10 in the units place
在十位處借1,當10到個位處
Estimate answers
估計答案
Is the answer reasonable?
答案是否合理?
Round down
截尾法/進位概念
Addition and subtraction of three numbers
三個數連加/減
Calculation
算式
Estimate the answer before the calculation
在列式計算前先估計答案
make 10
合十
Mixed operations of addition and substraction
加減混合計算
the most expensive
最貴
the cheapest
最便宜
Measure
量度
Kilometre (km)
公里/千米
Metre (m)
米
Centimetre (cm)
厘米
Millimetre (mm)
毫米
arm-span
臂距
Use suitable tools for measuring lengths, widths, heights and distances
用適當工具量度長度、寬度、高度和距離
Measuring tool
量度工具
Metre ruler
米尺
Tape measure
捲尺
Trundle wheel
滾輪
Centimetre ruler
厘米尺
Single unit
單名數
Multiplication
乘法
Repeated addition of the same number
把一個數字重覆連加起來
One time of two
2的一倍 (2 x 1)
Carrying
進位
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