elena's mechanical

加的英文= Plus (2+3... two plus three)

減的英文= Minus (5-3... five minus three)

乘的英文= times (3x2.... three times two)

除的英文= divide by (10*5... ten divide by five)

2/3 (two-thirds)

3/4(three-fourths)

5/8(five-eighths)

3/2(three-halves)

1/2:one falf;
1/4:one fourth;
1/6:one sixth;
5/7:five over seven;
12/13:twelve over thirteen;
3/4:three fourths or 3 quarters

１００／９９ ----  one hundred over ninety -nine or one hundred by ninety- nine

補充(數學):

數學-mathematical(math)

加法-addition

減法-subtraction

乘法-multiplication

除法-division

正數-plus

負數-minus

平方-square

立方-cubic

三角形-triangle

正方形-foursquare

四邊形-quadrangle

平行四邊形-parallelogram

梯形-trapezium

圓形-circle

橢圓形-ellipse

扇形-sector

半圓形-hemicycle

球體-globe

柱狀體-pillar

椎狀體-vertebra

線-line

面-coplanar

圓心-incenter

圓周-circumference

半徑-radius

直徑-diameter

圓周率-pi

幾何學-geometry

根號-root sign

向量-vector

象限-quadrant

拋物線-parabola

方程式-equate

不等式-inequality

微積分-calculus

等號-equality sign

百分率-percentage

圓規-compass

三角板-set square

算盤-abacus

直角-right angle

銳角-acute angle

鈍角-obtuse angle

分數-fraction

分母-denominator

小數-decimal

小數點-decimal point

整數-integer

循環小數-circulating decimal

有理數-rational number

無理數-irrational number

因數-factor

倍數-multiple

公因數-common factor

公倍數-common multiple

因數分解-resolution into factors

計算機-calculating machine

餘數-residue

個位數-units digit

十位數-tens digit

百位數-hundreds digit

千位數-thousands digit

無限大-drillion