Question 4 - Figure it out - Page 86, 87 - Chapter 4 Class 7 - Another Peek beyond the Point (Ganita Prakash II)

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Question 4 (a) Evaluate the following: (a) 25 ÷ ______ = 0.025We can write this as 25/🔲=0.025 25/🔲=25/1000 25 × 1000=🔲 × 25 (25 × 1000)/25=🔲 🔲=(25 × 1000)/25 🔲=𝟏𝟎𝟎𝟎 Thus, 25 ÷ 1000 = 0.025 Question 4 (b) Evaluate the following: (b) 25 ÷ ______ = 250We can write this as 25/🔲=250 25=🔲 × 250 (25 )/250=🔲 🔲=25/250 🔲=1/10 🔲=𝟎.𝟏 Thus, 25 ÷ 0.1 = 250 Question 4 (c) Evaluate the following: (c) 25 ÷ ______ = 2.5We can write this as 25/🔲=2.5 25/🔲=25/10 25 × 10=🔲 × 25 (25 × 10)/25=🔲 🔲=(25 × 10)/25 🔲=𝟏𝟎 Thus, 25 ÷ 10 = 2.5 Question 4 (d) Evaluate the following: (d) 25 ÷ 10 = 25 × _____We can write this as 25/10=25 × 🔲 25 × 1/10=25 × 🔲 25 × 0.1=25 × 🔲 Thus,🔲=0.1 And, we can write 25 ÷ 10 = 25 × 0.1 Question 4 (e) Evaluate the following: (e) 25 ÷ 0.10 = 25 × ______We can write this as 25/0.10=25 × 🔲 25 × 1/0.10=25 × 🔲 25 × 1/(10/100)=25 × 🔲 25 ×100/10=25 × 🔲 25 × 10=25 × 🔲 Thus, 🔲=𝟏𝟎 And, we can write 25 ÷ 0.10 = 25 × 10 Question 4 (f) Evaluate the following: (f) 25 ÷ 0.01 = 25 × ______We can write this as 25/0.01=25 × 🔲 25 × 1/0.01=25 × 🔲 25 × 1/(1/100)=25 × 🔲 25 ×100/1=25 × 🔲 25 × 100=25 × 🔲 Thus, 🔲=𝟏𝟎𝟎 And, we can write 25 ÷ 0.01 = 25 × 100