Unit three Beautiful street view -- double digit by double digit 美丽的街景——两位数乘两位数 LESSON ONE 第一课 There are 10 strings of 36 in each string. 每串36个，有10串。 There are 20 strings of 30 in each string. 每串30个，有20串。 What questions can you ask? 你能提出什么问题？ 1. How many red balloons are there? 1. 一共有多少个红气球？ Thirty-six times ten equals -- 36×10=——（个） Ten tens is 100,30 tens is 300, and 36 tens is 360. 10个十是100,30个十是300,36个十是360。 36 times 10, you can put a 0 after 36. 36×10，可以在36的后面添一个0。 2. How many blue balloons are there? 1. 一共有多少个蓝气球？ Thirty times twenty is equal —— 30×20=——（个） Lesson Two 第二课 Each row 23 POTS, a total of 12 rows. 每排23盆，共12排。 Average 32 sprinklers per row, a total of 30 rows. 平均每行32个喷头，共30行。 Each row 43 POTS, a total of 21 rows. 每排43盆，共21排。 What questions can you ask? 你能提出什么问题？ How many potted flowers were used in the "Protect the Environment" flower bed? 1. “保护环境”花坛一共用了多少盆花？ Twenty-three times twelve is ——（basin） 23×12=——（盆） Let's circle the idea map. 我们在点子图上圈圈看。 2. How many potted flowers are used in the "Beautify Our Homestead" flower bed? 1. “美化家园”花坛一共用了多少盆花？ Forty-three times twenty-one is equal ——（basin） 43×21=——（盆） So if you think about it, how can you check multiplication? 想一想，乘法可以怎样验算？ How many sprinklers are there? 1. 一共用了多少个喷头？ Thirty-two times thirty equals ——（ one） 32×30=——（个） Think about it. How do you multiply two-digit numbers by two-digit numbers? 想一想，怎样计算两位数乘两位数？ Lesson Three 第三课 The rent of an advertising lamp is 32 yuan a day, and there are 29 of the same advertising lamps in this street. 一个广告灯每天的租金是32元，这条街上有29个同样的广告灯。 48 light strips, each with 71 bulbs. 48根灯条，每根71个灯泡。 Each tree needs 36 meters of colored light line, to decorate 58 trees. 每棵树需要36米彩灯线，要装饰58棵树。 What questions can you ask? 你能提出什么问题？ How much is the daily rent for advertising lights in this street 1. 这条街的广告灯每天的租金是多少元？ Thirty-two times twenty-nine is ——（yuan） 32×29=——（元） 2. How many meters of colored lights are needed altogether? 1. 一共需要多少米彩灯线？ Interesting stickers |
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