三年级上册英语课件-UNIT 3 LET'S DO MATH LESSON 18 课件｜清华版（一起） (共15张PPT)

UNIT 3 LET’S DO MATH LESSON 18 十位数和个位数之间须用连字符“-”连接 eg. 21 twenty-one 54 fifty-four 63 sixty-three 78 seventy-eight 36 thirty-six 99 ninety-nine Again 21 22 24 twenty-one twenty-two twenty-four 25 27 29 twenty-five twenty-seven twenty-nine Learn and say ¥11 ¥29 I had 40 Yuan. I bought a hat and scarf. The hat was 11 Yuan. The scarf was 29 Yuan. How much money is left? 40-11=29, 29-29=0 Forty minus eleven is twenty-nine. Twenty-nine minus twenty-nine is zero. Zero Yuan is left. ¥15 ¥26 I had 45 Yuan. I bought a hat and scarf. The hat was 15 Yuan. The scarf was 26 Yuan. How much money is left? 45-15=30, 30-26=4 Forty-five minus fifteen is thirty Thirty minus twenty-six is four. Four Yuan is left. ¥17 ¥36 I had 60 Yuan. I bought a hat and scarf. The hat was 17 Yuan. The scarf was 36 Yuan. How much money is left? 60-17=43, 43-36=7 Sixty minus seventeen is forty-three. Forty-three minus thirty-six is seven. Seven Yuan is left. ¥21 ¥49