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Arrow-Puffin-3_Semester-1 Maths 163 Fill in the blanks.1. 12 x ____ = 4 x ____ = 48 2. ____ x 5 = 5 x ____ = 253. 9 x ____ = 54 4. ____ x ____ = 495. 1 x ____ = 0 6. 1 x ____ = 207. 38 x 1 = ____ 8. 125 x 0 = ____9. 5 thousands x 7 tens = _____________Estimate the product by rounding the numbers to the biggest place value.a. 158 x 22 b. 243 x 24 c. 775 x 34 d. 258 x 32e. 486 x 21 f. 406 x 16 g. 29 x 64 h. 508 x 12i. 208 x 27 j. 657 x 13ESTIMATION OF PRODUCTIn the previous chapter, you have learnt how to estimate the sum and difference of given numbers.Let's learn how to estimate the product of given numbers.For example, estimate the product of 365 x 22.Round 365 to the nearest hundred and 22 to the nearest ten.So, 365 to the nearest hundreds is 400and 22 to the nearest tens is 20.Then, 400 x 20 = 8000The estimated product is 8000.The actual product is 365 x 22 = 8030.Let's Understand Conceptual Understanding Let's Practise 4.12 ApplicationLet's Solve Problem Solving Skills