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【简答题】
36□984≈36万，“□”有______种填法； 427000＞42□000，“□”有______种填法．
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举一反三
【简答题】能用简便方法的用简便方法． （1）6502+672÷28×17 （2）3.4×2.79+0.21×3.4 （3）（ 5 12 + 1 9 + 3 8 ）×72 （4） [( 1 2 - 1 5 )÷ 3 4 ]÷ 3 5 ．
【简答题】coronavirus.mp4 Answer the following questions according to the above video about coronavirus. What are coronavirus named for? What is the goal of a virus? What are the mild symptoms like? Where was t...
【简答题】计算，能简便的用简便方法． 13 14 ×13+ 13 14 8 15 × 8 9 + 8 9 × 7 15 23× 14 39 +14× 16 39 6×[ 8 9 -（ 1 2 - 1 6 ）] （ 7 8 + 1 6 + 2 3 ）×48 （ 1 4 + 1 5 ）×20．
【多选题】What are the symptoms of coronavirus?
A.
have a fever
B.
have a dry cough
C.
feel tired and weak
D.
have difficulty breathing
【简答题】递等式计算，能简便的用简便方法． 4 9 × 5 13 + 5 13 × 5 9 5 8 × 2 7 ×16 49× 11 48 34 35 ×12+ 12 35 （ 3 4 + 1 5 ）×12×35 （ 7 8 + 1 6 + 2 3 ）×48．
【简答题】能用简便方法的要用简便方法． ①58-16÷ 4 5 ② 2 9 - 6 15 × 2 9 ③62.5÷2.5÷4 ④8160÷24-36×2.5 ⑤ 36×( 5 6 + 1 12 - 1 3 ) ⑥ 3.5÷[1-(0.4+ 1 4 )] ．
【简答题】我会用简便方法计算． 3 4 × 1 5 + 3 4 × 2 5 +0.75× 3 5 - 3 4 ．
【简答题】用简便方法计算． 5 4 × 1 2 × 3 5 3 7 × 1 5 × 7 9 18× 2 3 × 5 6 20 51 × 17 30 ×9 11 36 ×27× 4 33 1 5 6 × 2 3 × 3 22 ．
【单选题】What is coronavirus?
A.
Coronaviruses are a whole family of viruses.
B.
They often cause any real clinical illness
C.
This new virus, like those other rogue viruses, probably was first transmitted to animals from humans.
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