Page 110 - NUMINO Challenge_A1

3. The Greatest Product

Investigate (2-Digit Number) (2-Digit Number) Multiplication Sentences Made with Four Number Cards
90 4

70 6300 280 52 1 81
8 52
3 270 12 4212
4168
94 73 6300 280 280 12 72
6862 3 432 43
90 7 3096

70 6300 210 3024 91
64
4 360 12 641 5824
9

5769

94 74 6300 210 360 12
6882

Type Study Making Multiplication Sentences with Number Cards
1 The two ways to make two multiplication sentences with four number cards are:

(3-digit number) (1-digit number) and (2-digit number) (2-digit number)

2 (3-digit number) (1-digit number): First, use the greatest number card as the 1-digit
number. Then, place the second greatest number card in the hundreds place and the
two next greatest number cards in the tens and ones place of the 3-digit number.
Therefore, the greatest product is 742 8 5,936.

(2-digit number) (2-digit number): Place the first and second greatest numbers in the
tens place and place the remaining two number cards in the ones place such that the
product is the greatest. Therefore, the greatest product is 82 74 6,068.

3 82 74 6,068

5Answer Key