Wk. 1: Use approximation strategies to estimate the solution to a 2-digit number
e.g. 47 x 81 = approx 50 x 80
Wk. 2: Mentally multiply any whole number by 100, answers within 99999.
Wk. 3: Divide any number within 99999 by 10, using the concept that digits move one place to the right, as the value of each digit becomes 10 times smaller.
Wk. 4: Mentally subtract a 2 digit multiple of 10 from a 3-digit multiple of 10, without bridging the hundred.
Wk. 5: Mentally subtract a 3-digit multiple of 10 from a 3 digit multiple of 10, without bridging the hundred.
Wk. 6: Mentally subtract a 2 digit multiple of 10 from a 3-digit multiple of 10, without bridging the hundred.
Wk. 7: Mentally add a 3-digit multiple of 10 to a 3 digit multiple of 10, without bridging the hundred.
Wk. 8: Mentally multiply any whole number by 100, answers within 99,000.