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Bài 1: Viết số thích hợp vào chỗ chấm 28 cm = ……………………….mm 105dm = ………………………cm 312m = ………………………dm 15km = ………………………m 7m25cm =…………………..cm 2km 58m = …………………..m 730m = ……………………….dam 4500m = ………………………hm 3000cm = ………………………m 18000m = ………………………km 165dm =…………m………..dm 2080m = ……………km………..m 21 yến = ………………………..kg 130 tạ = ………………………..kg 44 tấn = ………………………..kg 3kg 125g =…………………..g 2kg 50g = ……………………g 320 kg = ………………………..yến 4600 kg = ………………………..tạ 19 000kg = ………………………..tấn 1256g = ……………kg…………..g 6005g = ………………kg…………g 8 dam2 = …………………m2 20 hm2 = …………………dam2 5 cm2 = …………………mm2 7 hm2 = …………………m2 13 km2 = …………………m2 1/10 hm2 = …………………m2 3/5 hm2 = …………………m2 38 m2 25dm2 = ……………………dm2 15 dm2 9cm2 = ……………………cm2 10 cm2 6mm2 = ……………………mm2 300 m2 = …………………dam2 2100 dam2 = …………………hm2 900 mm2 = …………………cm2 50 000 m2 = …………………hm2 34 000 hm2 = …………………km2 1/10 km2 = …………………hm2 1/2 km2 = …………………hm2 198 cm2= ………………dm2……………..cm2 2080 dm2= ……………m2……………..dm2 3107 mm2= ……………cm2……………..mm2

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III. Use the given words to complete the sentences. 1.Why shouldn’t I touch the stove?( get a burn) ……………………………………………………………………………………………………. 2.Why shouldn’t Mai play with the knife?( cut herself) ……………………………………………………………………………………………………… 3.Why shouldn’t Tom run down the stairs?( break his arms) ……………………………………………………………………………………………………. 4.Why shouldn’t the boys climb the tree?( fall down the tree) …………………………………………………………………………………………………….. 5.Why shouldn’t I swim in the river?(dangerous)………………………………………………... IV. Find and correct the mistake. 1.How’s the matter with you? 2.You shouldn’t drinks cold water. 3.Why shouldn’t me play with matches? 4.Do you knows how to cook the cabbage? 5.Don’t run down the stairs! Yes, I won’t. 6.You should go to the dentist.----Yes, I do. Thanks. V. Reorder the words to make complete sentences. 1.not / candies / too / You / many / should /eat/ . / ……………………………………………………………………………………………………… 2.in / Do / the / football / street / not / play / . / …………………………………………………………………………………………………….. 3.with / I shouldn’t / knife / Why / the / play / ?/ …………………………………………………………………………………………………….. 4.he / off / Because / the / fall / tree / may / . /………………………….......................................... 5.him / What / is / with / the / matter/ ? /…………………………………………………………. 6.doing / are / What / the / you / knife / with / ? / ………………………………………………… 7.she / with / Should / the / neighbor’s / play / cat / ? /…………………………………………....

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